from http import client as http_client

from django.conf import settings
from django.urls import reverse

from oscar.apps.order.models import Order, OrderNote, PaymentEvent, PaymentEventType
from oscar.core.loading import get_model, get_class
from oscar.test.factories import (
    PartnerFactory,
    ShippingAddressFactory,
    SourceTypeFactory,
    create_basket,
    create_order,
)
from oscar.test.testcases import WebTestCase

Basket = get_model("basket", "Basket")
Partner = get_model("partner", "Partner")
ShippingAddress = get_model("order", "ShippingAddress")
DashboardPermission = get_class("dashboard.permissions", "DashboardPermission")


class TestOrderListDashboard(WebTestCase):
    is_staff = True
    permissions = DashboardPermission.get("order", "view_order", "change_order")

    def test_redirects_to_detail_page(self):
        order = create_order()
        page = self.get(reverse("dashboard:order-list"))
        form = page.forms["search_form"]
        form["order_number"] = order.number
        response = form.submit()
        self.assertEqual(http_client.FOUND, response.status_code)

    def test_downloads_to_csv_without_error(self):
        address = ShippingAddressFactory()
        create_order(shipping_address=address)
        page = self.get(reverse("dashboard:order-list"))
        form = page.forms["orders_form"]
        form["selected_order"].checked = True
        form.submit("download_selected")

    def test_allows_order_number_search(self):
        page = self.get(reverse("dashboard:order-list"))
        form = page.forms["search_form"]
        form["order_number"] = "+"
        form.submit()


class PermissionBasedDashboardOrderTestsBase(WebTestCase):
    permissions = DashboardPermission.partner_dashboard_access
    username = "user1@example.com"

    def setUp(self):
        """
        Creates two orders. order_in has self.user in it's partner users list.
        """
        super().setUp()
        self.address = ShippingAddressFactory()
        self.basket_in = create_basket()
        self.basket_out = create_basket()
        # replace partner with one that has the user in it's users list
        self.partner_in = PartnerFactory(users=[self.user])
        stockrecord = self.basket_in.lines.all()[0].stockrecord
        stockrecord.partner = self.partner_in
        stockrecord.save()

        self.order_in = create_order(
            basket=self.basket_in, shipping_address=self.address
        )
        self.order_out = create_order(
            basket=self.basket_out, shipping_address=self.address
        )


class PermissionBasedDashboardOrderTestsNoStaff(PermissionBasedDashboardOrderTestsBase):
    is_staff = False

    def test_non_staff_can_only_list_her_orders(self):
        # order-list user1
        response = self.get(reverse("dashboard:order-list"))
        self.assertEqual(set(response.context["orders"]), set([self.order_in]))

        # order-detail user2
        url = reverse("dashboard:order-detail", kwargs={"number": self.order_in.number})
        self.assertIsOk(self.get(url))

        url = reverse(
            "dashboard:order-detail", kwargs={"number": self.order_out.number}
        )
        self.assertNoAccess(self.get(url, status="*"))

        # order-line-detail user2
        url = reverse(
            "dashboard:order-line-detail",
            kwargs={
                "number": self.order_in.number,
                "line_id": self.order_in.lines.all()[0].pk,
            },
        )
        self.assertIsOk(self.get(url))
        url = reverse(
            "dashboard:order-line-detail",
            kwargs={
                "number": self.order_out.number,
                "line_id": self.order_out.lines.all()[0].pk,
            },
        )
        self.assertNoAccess(self.get(url, status="*"))

        # order-shipping-address
        url = reverse(
            "dashboard:order-shipping-address", kwargs={"number": self.order_in.number}
        )
        self.assertIsOk(self.get(url))
        url = reverse(
            "dashboard:order-shipping-address", kwargs={"number": self.order_out.number}
        )
        self.assertNoAccess(self.get(url, status="*"))


class PermissionBasedDashboardOrderTestsStaff(PermissionBasedDashboardOrderTestsBase):
    is_staff = True
    permissions = DashboardPermission.get("order", "view_order")

    def test_staff_user_can_list_all_orders(self):
        orders = [self.order_in, self.order_out]
        # order-list
        response = self.get(reverse("dashboard:order-list"))
        self.assertIsOk(response)
        self.assertEqual(set(response.context["orders"]), set(orders))
        # order-detail
        for order in orders:
            url = reverse("dashboard:order-detail", kwargs={"number": order.number})
            self.assertIsOk(self.get(url))


class TestOrderListSearch(WebTestCase):
    is_staff = True
    permissions = DashboardPermission.get("order", "view_order")

    TEST_CASES = [
        ({}, []),
        ({"order_number": "abcd1234"}, ['Order number starts with "abcd1234"']),
        ({"name": "Bob Smith"}, ['Customer name matches "Bob Smith"']),
        (
            {"product_title": "The Art of War"},
            ['Product name matches "The Art of War"'],
        ),
        ({"upc": "abcd1234"}, ['Includes an item with UPC "abcd1234"']),
        ({"partner_sku": "abcd1234"}, ['Includes an item with partner SKU "abcd1234"']),
        ({"date_from": "2015-01-01"}, ["Placed after 2015-01-01"]),
        ({"date_to": "2015-01-01"}, ["Placed before 2015-01-02"]),
        (
            {"date_from": "2014-01-02", "date_to": "2015-03-04"},
            ["Placed between 2014-01-02 and 2015-03-04"],
        ),
        ({"voucher": "abcd1234"}, ['Used voucher code "abcd1234"']),
        ({"payment_method": "visa"}, ["Paid using Visa"]),
        (
            # Assumes that the test settings (OSCAR_ORDER_STATUS_PIPELINE)
            # include a state called 'A'
            {"status": "A"},
            ["Order status is A"],
        ),
        (
            {
                "name": "Bob Smith",
                "product_title": "The Art of War",
                "upc": "upc_abcd1234",
                "partner_sku": "partner_avcd1234",
                "date_from": "2014-01-02",
                "date_to": "2015-03-04",
                "voucher": "voucher_abcd1234",
                "payment_method": "visa",
                "status": "A",
            },
            [
                'Customer name matches "Bob Smith"',
                'Product name matches "The Art of War"',
                'Includes an item with UPC "upc_abcd1234"',
                'Includes an item with partner SKU "partner_avcd1234"',
                "Placed between 2014-01-02 and 2015-03-04",
                'Used voucher code "voucher_abcd1234"',
                "Paid using Visa",
                "Order status is A",
            ],
        ),
    ]

    def test_search_filter_descriptions(self):
        SourceTypeFactory(name="Visa", code="visa")
        url = reverse("dashboard:order-list")
        for params, expected_filters in self.TEST_CASES:
            # Need to provide the order number parameter to avoid
            # being short-circuited to "all results".
            params.setdefault("order_number", "")

            response = self.get(url, params=params)
            self.assertEqual(response.status_code, 200)
            applied_filters = [
                el.text.strip()
                for el in response.html.select(".search-filter-list .badge")
            ]
            self.assertEqual(applied_filters, expected_filters)


class TestOrderDetailPage(WebTestCase):
    is_staff = True
    permissions = DashboardPermission.get(
        "order", "view_order", "add_order", "change_order"
    )

    def setUp(self):
        super().setUp()
        # ensures that initial statuses are as expected
        self.order = create_order()
        self.event_type = PaymentEventType.objects.create(name="foo")
        url = reverse("dashboard:order-detail", kwargs={"number": self.order.number})
        self.page = self.get(url)

    def test_contains_order(self):
        self.assertEqual(self.page.context["order"], self.order)

    def test_allows_notes_to_be_added(self):
        form = self.page.forms["order_note_form"]
        form["message"] = "boom"
        response = form.submit()
        self.assertIsRedirect(response)
        notes = self.order.notes.all()
        self.assertEqual(1, len(notes))

    def test_allows_line_status_to_be_changed(self):
        line = self.order.lines.all()[0]
        self.assertEqual(line.status, settings.OSCAR_INITIAL_LINE_STATUS)

        form = self.page.forms["order_lines_form"]
        form["line_action"] = "change_line_statuses"
        form["new_status"] = new_status = "b"
        form["selected_line"] = [line.pk]
        form.submit()
        # fetch line again
        self.assertEqual(self.order.lines.all()[0].status, new_status)

    def test_allows_order_status_to_be_changed(self):
        form = self.page.forms["order_status_form"]
        self.assertEqual(self.order.status, settings.OSCAR_INITIAL_ORDER_STATUS)

        form = self.page.forms["order_status_form"]
        form["new_status"] = new_status = "B"
        form.submit()

        # fetch order again
        self.assertEqual(Order.objects.get(pk=self.order.pk).status, new_status)

    def test_allows_creating_payment_event(self):
        line = self.order.lines.all()[0]
        form = self.page.forms["order_lines_form"]
        form["line_action"] = "create_payment_event"
        form["selected_line"] = [line.pk]
        form["payment_event_type"] = self.event_type.code
        form.submit()

        self.assertTrue(PaymentEvent.objects.exists())


class TestChangingOrderStatus(WebTestCase):
    is_staff = True
    permissions = DashboardPermission.get("order", "view_order", "change_order")

    csrf_checks = False

    def setUp(self):
        super().setUp()

        Order.pipeline = {"A": ("B", "C"), "B": ("C",), "C": ()}
        self.order = create_order(status="A")
        url = reverse("dashboard:order-detail", kwargs={"number": self.order.number})

        page = self.get(url)
        form = page.forms["order_status_form"]
        form["new_status"] = "B"
        self.response = form.submit()

    def reload_order(self):
        return Order.objects.get(number=self.order.number)

    def test_works(self):
        self.assertIsRedirect(self.response)
        self.assertEqual("B", self.reload_order().status)

    def test_creates_system_note(self):
        notes = self.order.notes.all()
        self.assertEqual(1, len(notes))
        self.assertEqual(OrderNote.SYSTEM, notes[0].note_type)

    def test_bulk_status_update_no_selections(self):
        response = self.post(
            reverse("dashboard:order-list"),
            params={
                "new_status": "C",
                "action": "change_order_statuses",
            },
        )
        self.assertEqual(response.status_code, 302)
        self.assertEqual("B", self.reload_order().status)

    def test_bulk_status_update_selection(self):
        response = self.post(
            reverse("dashboard:order-list"),
            params={
                "new_status": "C",
                "selected_order": [self.order.pk],
                "action": "change_order_statuses",
            },
        )
        self.assertEqual(response.status_code, 302)
        self.assertEqual("C", self.reload_order().status)

    def test_bulk_status_update_all_across(self):
        response = self.post(
            reverse("dashboard:order-list"),
            params={
                "new_status": "C",
                "select_across": "1",
                "action": "change_order_statuses",
            },
        )
        self.assertEqual(response.status_code, 302)
        self.assertEqual("C", self.reload_order().status)


class TestChangingOrderStatusFromFormOnOrderListView(WebTestCase):
    is_staff = True
    permissions = DashboardPermission.get("order", "view_order", "change_order")

    def setUp(self):
        super().setUp()

        Order.pipeline = {"A": ("B", "C"), "B": ("A", "C"), "C": ("A", "B")}
        self.order = create_order(status="A")
        url = reverse("dashboard:order-list")

        page = self.get(url)
        form = page.forms["orders_form"]
        form["new_status"] = "B"
        form["selected_order"] = self.order.pk
        self.response = form.submit(name="action", value="change_order_statuses")

    def reload_order(self):
        return Order.objects.get(number=self.order.number)

    def test_works(self):
        self.assertIsRedirect(self.response)
        # Has the order status been changed?
        self.assertEqual("B", self.reload_order().status)

        # Is a system note created?
        notes = self.order.notes.all()
        self.assertEqual(1, len(notes))
        self.assertEqual(OrderNote.SYSTEM, notes[0].note_type)


class LineDetailTests(WebTestCase):
    is_staff = True
    permissions = DashboardPermission.get("order", "view_order")

    def setUp(self):
        self.order = create_order()
        self.line = self.order.lines.all()[0]
        self.url = reverse(
            "dashboard:order-line-detail",
            kwargs={"number": self.order.number, "line_id": self.line.id},
        )
        super().setUp()

    def test_line_detail_page_exists(self):
        response = self.get(self.url)
        self.assertIsOk(response)

    def test_line_in_context(self):
        response = self.get(self.url)
        self.assertInContext(response, "line")
